Perhaps you should try some spelling variations:
american psychological » american psychology, design psychological
medical psychological » media psychological, medical psychosocial, clinical psychological
medico sociological » medical sociological, medico psychological, medico biological

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((medical psychological) OR (american psychological))) OR (medico sociological)) association*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((medical psychological) OR (american psychological))) or (medico sociological)) association*".